I'll start.
Did you know that Wil "Wesley Crusher" Wheaton's first credited acting role was Martin on the Secret of NIMH animated film? That was probably the last time he sounded assertive and tough in an acting role too, and he was both a little kid and a mouse. :rat-salute:
Ooh, then did you know when Viggo Martinson kicked that helmet in LOTR and shouts in pain cause he thought merry and pippin died he actually broke his toe! And he just used it!
Oh wow I hadn’t heard that one! Did you know that the reason they barely show the shark in Jaws is that the animatronics sucked?
That shark almost killed George Lucas when he was touring the set